Aerospace and Electronic Systems Magazine April 2018 - 13

Wahl and Turkoglu

Figure 13.

Figure 12.

Results of real-time NRHC on a preplanned trajectory, with ±10%
actuator deviation, showing actuator deviation vs. nominal condition.

within certain limits and studies robustness properties of the overall dynamics in such scenarios.
To determine whether the system is robust to actuator deviation,
a set of 1,000 Monte Carlo simulations was again run on the two
square wave scenarios, this time with random Gaussian noise (with
a 3σ distribution of 10%) being injected into the actuator behavior.
APRIL 2018

Results of real-time NRHC on an on-the-fly trajectory, with ±10%
actuator deviation, showing actuator deviation vs. nominal condition.

As can be seen in Figures 12 and 13, even with roughly ±10%
actuator deviation, the envelope for the resulting angle-of-attack
tracking is better than that for sensor noise, typically falling within
a half-degree or less of variance. (This translates to ±2%, except
near the initial conditions, where having an α of near 0 throws off
the calculation of the error percentage.)

IEEE A&E SYSTEMS MAGAZINE

13



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